Home Original page

[PATCH] x86: drop redundant SYSCALL/SYSRET templates

Jan Beulich jbeulich@suse.com
Tue Nov 12 07:19:00 GMT 2019 
On 11.11.2019 18:15,  H.J. Lu  wrote:
> On Mon, Nov 11, 2019 at 4:01 AM Jan Beulich <jbeulich@suse.com> wrote:
>> --- a/opcodes/i386-opc.tbl
>> +++ b/opcodes/i386-opc.tbl
>> @@ -2797,9 +2797,7 @@ pswapd, 2, 0xf0f, 0xbb, 2, Cpu3dnowA, Mo
>>
>>  // AMD extensions.
>>  syscall, 0, 0xf05, None, 2, CpuSYSCALL, No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf, { 0 }
>> -syscall, 0, 0xf05, None, 2, Cpu64, No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf, { 0 }
>>  sysret, 0, 0xf07, None, 2, CpuSYSCALL, DefaultSize|No_bSuf|No_wSuf|No_sSuf|No_ldSuf, { 0 }
>> -sysret, 0, 0xf07, None, 2, Cpu64, DefaultSize|No_bSuf|No_wSuf|No_sSuf|No_ldSuf, { 0 }
>>  swapgs, 0, 0xf01f8, None, 3, Cpu64, No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf, { 0 }
>>  rdtscp, 0, 0xf01f9, None, 3, CpuRdtscp, No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf, { 0 }
> 
> Can you add a testcase?

The insns are being tested already, so I wonder what you want to be
tested in addition. What completely lacks testing are SYSENTER/SYSEXIT.

Jan
More information about the Binutils mailing list